Vibra-Tite 121 Medium Strength Threadlocker is a removable, blue anaerobic adhesive engineered for locking threaded fasteners and screws up to 0.75 inch (3/4 inch) in diameter. Ideal for knife building, gear assembly, holster hardware, and workshop repairs, this formula provides secure holding power while still allowing disassembly using standard hand tools. Vibra-Tite 121 offers strong resistance to vibration, heat, and solvents, making it a dependable option in demanding shop environments.
This medium strength threadlocker performs reliably on steel, stainless, plated metals, and other alloy parts, and is perfect for use on bolts, screws, and fasteners that may need future adjustment or maintenance.
Vibra-Tite 121 competes directly with top industry brands, including Loctite 242, ASI 42 TL, Felpro 5140, Holdtite T42, Hernon Nuts N Bolts 423, Instabond 124, Pacer ANL-42, Parson 3242, Permabond MM115, Permatex 81788, 81789, 81790, Rite-Lok TL42, Saf-T-Lok T42, Threebond 1344, Titan 7242, and Turbo-Lock 11.
Specifications:
Color: Blue
Viscosity: 900–1500 cP
Temperature Range: -65°F to 300°F
Maximum Gap Fill: 0.007 inch
Breakaway Torque: 100 in-lbs
Prevailing Off Torque: 45 in-lbs
Fixture Time: 15–20 minutes
Full Cure Time: 24 hours
Specific Gravity: 1.06
Primers Compatible: N, T
Specifications Met: ASTM D-5363, MIL-S-46163A, NSF Non-Food Grade
Volume: 2 ml (0.07 oz)
